Programa para n-ésimo número par

Dado un número n, imprime el n-ésimo número par. El primer número par es 2, el segundo es 4 y así sucesivamente.

Ejemplos:

Input : 3
Output : 6
First three even numbers are 2, 4, 6, ..

Input : 5
Output : 10
First five even numbers are 2, 4, 6, 8, 19..

El n-ésimo número par viene dado por la fórmula 2*n.

// CPP program to find the nth even number
#include <bits/stdc++.h>
using namespace std;
  
// Function to find the nth even number
int nthEven(int n)
{
    return (2 * n);
}
  
// Driver code
int main()
{
    int n = 10;
    cout << nthEven(n);
    return 0;
}

// JAVA program to find the nth EVEN number
  
class GFG
{
    // Function to find the nth odd number
    static int nthEven(int n)
    {
        return (2 * n);
    }
      
    // Driver code
    public static void main(String [] args)
    {
        int n = 10;
        System.out.println(nthEven(n));
          
    }
}
  
// This code is contributed
// by ihritik

# Python 3 program to find the 
# nth odd number
  
#  Function to find the nth Even number
def nthEven(n):
  
    return (2 * n)
      
# Driver code
if __name__=='__main__':
    n = 10
    print(nthEven(n))
  
# This code is contributed
# by ihritik

// C# program to find the 
// nth EVEN number
using System;
  
class GFG
{
// Function to find the
// nth odd number
static int nthEven(int n)
{
    return (2 * n);
}
  
// Driver code
public static void Main()
{
    int n = 10;
    Console.WriteLine(nthEven(n));
}
}
  
// This code is contributed
// by anuj_67

<?php
// PHP program to find the
// nth even number
  
// Function to find the
// nth even number
function nthEven($n)
{
    return (2 * $n);
}
  
// Driver code
$n = 10;
echo nthEven($n);
  
// This code is contributed
// by anuj_67
?>